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                              EMPLOYMENT AGREEMENT


                                     BETWEEN


                                  GREGORY WEBB


                                       AND


                     INTERDIGITAL COMMUNICATIONS CORPORATION








                                                 OCTOBER 14, 1996


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                                       -1-







                              EMPLOYMENT AGREEMENT


     THIS EMPLOYMENT AGREEMENT is made this 16th day of October, 1996, by and
between Gregory Webb, a resident of San Diego, California (the "Employee"), and
InterDigital Communications Corporation, a corporation organized and existing
under the laws of the Commonwealth of Pennsylvania (the "Company").


     WHEREAS, the Company is engaged in the business of developing and marketing
advanced digital wireless telecommunications systems using proprietary
technologies for voice and data communications and the licensing of wireless
digital telephone technology (the "Business").

     WHEREAS, the Company and Employee have entered into a letter agreement,
dated October 3, 1996, pursuant to which, inter alia, the Company has offered
Employee and Employee has accepted the position of Chief Executive Officer of
the Company (the "Letter Agreement").

     WHEREAS, the Letter Agreement contemplates that the Company and Employee
shall enter into this Agreement in order to set forth certain terms and
conditions relating to Employee's employment with the Company.

     NOW, THEREFORE, in consideration of the mutual covenants and obligations
contained herein, and intending to be legally bound, the parties, subject to the
terms and conditions set forth herein, agree as follows:


     1. Employment and Term. The Company hereby employs Employee and Employee
hereby accepts employment with the Company, as Chief Executive Officer of the
Company, (such position, Employee's "Position") for a period commencing on the
date hereof and continuing until employment hereunder is terminated pursuant to
the provisions of Section 9 hereto (the "Term").




                                       -1-







     2. Duties. During the term of his employment, Employee shall serve the
Company faithfully and to the best of his ability and shall devote his full
time, attention, skill and efforts to the performance of the duties required by
or appropriate for his Position. Employee agrees to assume such duties and
responsibilities as may be customarily incident to such position, and as may be
reasonably assigned to Employee from time to time by the Board of Directors of
the Company. Employee shall report to the Board of Directors of the Company.


     3. Other Business Activities. During the Term, Employee will not, without
the prior written consent of the Company, directly or indirectly engage in any
other business activities or pursuits whatsoever, except activities in
connection with any charitable or civic activities, personal investments and
serving as an executor, trustee or in other similar fiduciary capacity;
provided, however, that such activities do not interfere with his performance of
his responsibilities and obligations pursuant to this Agreement.

     4. Compensation. The Company shall pay Employee, and Employee hereby agrees
to accept, as compensation for all services rendered hereunder and for
Employee's covenant not to compete as provided for in Section 8 hereof, a base
salary at the annual rate of Two Hundred Fifty Thousand Dollars (subject to any
increase from time to time, the "Base Salary"). The Base Salary shall be
inclusive of all applicable income, social security and other taxes and charges
which are required by law to be withheld by the Company or which are requested
to be withheld by Employee, and which shall be withheld and paid in accordance
with the Company's normal payroll practice for its similarly situated employees
from time to time in effect. In addition to the Base Salary, Employee shall be
eligible to participate in whatever bonus plan, if any, the Company shall adopt
for its executive officers, including without limitation, the Executive Bonus
Plan the Company currently intends to develop and implement with the assistance
of Ernst & Young. In the event such a plan is implemented during 1996, Employee
will be eligible to receive a bonus based upon the number of full weeks in which
Employee is employed by the Company during 1996. Notwithstanding the foregoing
two sentences, the Company shall be under no obligation to develop and/or
implement any bonus plan, including without


                                       -2-







limitation, the aforesaid Executive Bonus Plan, or to continue any such plan, if
adopted. Employee shall also be entitled to receive stock options as more
particularly described in the Letter Agreement.


     5. Benefits and Expenses. Employee shall be entitled to receive those
employee benefits (including expense reimbursement) as shall be provided to
similarly situated executive employees of the Company ("Benefits").


     6. Confidentiality. Employee recognizes and acknowledges that the
Proprietary Information (as hereinafter defined) is a valuable, special and
unique asset of the Business of the Company. As a result, both during the Term
and thereafter, Employee shall not, without the prior written consent of the
Company, for any reason either directly or indirectly divulge to any third-party
or use for his own benefit, or for any purpose other than the exclusive benefit
of the Company, any confidential, proprietary, business and technical
information or trade secrets of the Company or of any subsidiary or affiliate of
the Company ("Proprietary Information") revealed, obtained or developed in the
course of his employment with the Company. Such Proprietary Information shall
include, but shall not be limited to, the intangible personal property described
in Section 7(b) hereof, any information relating to methods of production and
manufacture, research, computer codes or instructions (including source and
object code listings, program logic algorithms, subroutines, modules or other
subparts of computer programs and related documentation, including program
notation), computer processing systems and techniques, concepts, layouts,
flowcharts, specifications, know-how, any associated user or service manuals or
other like textual materials (including any other data and materials used in
performing the Employee's duties), all computer inputs and outputs (regardless
of the media on which stored or located), hardware and software configurations,
designs, architecture, interfaces, plans, sketches, blueprints, and any other
materials prepared by the Employee in the course of, relating to or arising out
of his employment by the Company, or prepared by any other Company employee,
representative, or contractor for the Company, or its customers (including
information and other material relating to the ASIC), costs,


                                       -3-







business studies, business procedures, finances, marketing data, methods, plans
and efforts, the identities of licensees, strategic partners, customers,
contractors and suppliers and prospective licensees, strategic partners,
customers, contractors and suppliers, the terms of contracts and agreements with
licensees, strategic partners, customers, contractors and suppliers, the
Company's relationship with actual and prospective licensees, strategic
partners, customers, contractors and suppliers and the needs and requirements
of, and the Company's course of dealing with, any such actual or prospective
licensees, strategic partners, customers, contractors and suppliers, personnel
information, customer and vendor credit information, and any other materials
that have not been made available to the general public, provided, that nothing
herein contained shall restrict Employee's ability to make such disclosures
during the course of his employment as may be necessary or appropriate to the
effective and efficient discharge of the duties required by or appropriate for
his Position or as such disclosures may be required by law; and further
provided, that nothing herein contained shall restrict Employee from divulging
or using for his own benefit or for any other purpose any Proprietary
Information that is readily available to the general public so long as such
information did not become available to the general public as a direct or
indirect result of Employee's breach of this Section 6. Failure by the Company
to mark any of the Proprietary Information as confidential or proprietary shall
not affect its status as Proprietary Information under the terms of this
Agreement.


     7. Property.

        (a) All right, title and interest in and to Proprietary Information
shall be and remain the sole and exclusive property of the Company. During
the Term, Employee shall not remove from the Company's offices or premises any
documents, records, notebooks, files, correspondence, reports, memoranda or
similar materials of or containing Proprietary Information, or other materials
or property of any kind belonging to the Company unless necessary or appropriate
in accordance with the duties and responsibilities required by or appropriate
for his Position and, in the event that such materials or property are removed,
all of the foregoing shall be returned to their proper files or places of
safekeeping as promptly as possible


                                       -4-






after the removal shall serve its specific purpose. Employee shall not make,
retain, remove and/or distribute any copies of any of the foregoing for any
reason whatsoever except as may be necessary in the discharge of his assigned
duties and shall not divulge to any third person the nature of and/or contents
of any of the foregoing or of any other oral or written information to which he
may have access or with which for any reason he may become familiar, except as
disclosure shall be necessary in the performance of his duties; and upon the
termination of his employment with the Company, he shall leave with or return to
the Company all originals and copies of the foregoing then in his possession,
whether prepared by Employee or by others.

        (b) (i) Employee agrees that all right, title and interest in and to any
innovations, designs, systems, analyses, ideas for marketing programs, and all
copyrights, patents, trademarks and trade names, or similar intangible personal
property which have been or are developed or created in whole or in part by
Employee (1) at any time and at any place while the Employee is employed by
Company and which, in the case of any or all of the foregoing, are related to
and used in connection with the Business of the Company, (2) as a result of
tasks assigned to Employee by the Company, or (3) from the use of premises or
personal property (whether tangible or intangible) owned, leased or contracted
for by the Company (collectively, the "Intellectual Property"), shall be and
remain forever the sole and exclusive property of the Company. The Employee
shall promptly disclose to the Company all Intellectual Property, and the
Employee shall have no claim for additional compensation for the Intellectual
Property.

           (ii) The Employee acknowledges that all the Intellectual Property
that is copyrightable shall be considered a work made for hire under United
States Copyright Law. To the extent that any copyrightable Intellectual Property
may not be considered a work made for hire under the applicable provisions of
the United States Copyright Law, or to the extent that, notwithstanding the
foregoing provisions, the Employee may retain an interest in any Intellectual
Property that is not copyrightable, the Employee hereby irrevocably assigns and
transfers to the Company any and all right, title, or interest that the Employee
may have in the Intellectual Property under copyright, patent, trade secret and
trademark law, in perpetuity


                                       -5-





or for the longest period otherwise permitted by law, without the necessity of
further consideration. The Company shall be entitled to obtain and hold in its
own name all copyrights, patents, trade secrets, and trademarks with respect
thereto.

           (iii) Employee further agrees to reveal promptly all information
relating to the same to an appropriate officer of the Company and to
cooperate with the Company and execute such documents as may be necessary or
appropriate (1) in the event that the Company desires to seek copyright, patent
or trademark protection, or other analogous protection, thereafter relating to
the Intellectual Property, and when such protection is obtained, to renew and
restore the same, or (2) to defend any opposition proceedings in respect of
obtaining and maintaining such copyright, patent or trademark protection, or
other analogous protection.

           (iv) In the event the Company is unable after reasonable effort to
secure Employee's signature on any of the documents referenced in Section
7(b)(iii) hereof, whether because of Employee's physical or mental incapacity or
for any other reason whatsoever, Employee hereby irrevocably designates and
appoints the Company and its duly authorized officers and agents as Employee's
agent and attorney-in-fact, to act for and in his behalf and stead to execute
and file any such documents and to do all other lawfully permitted acts to
further the prosecution and issuance of any such copyright, patent or trademark
protection, or other analogous protection, with the same legal force and effect
as if executed by Employee.


     8. Covenant Not to Compete. The Employee shall not, during the Term and
thereafter for the Restricted Period (as defined below), do any of the
following, directly or indirectly, without the prior written consent of the
Company:

        (a) engage or participate in any business activity competitive with the
Company's Business, or the business of any of the Company's subsidiaries or
affiliates, as same are conducted during the Term with respect to any period
during the Term, or upon the termination of Employee's employment hereunder with
respect to any period thereafter;



                                       -6-





        (b) become interested in (as owner, stockholder, lender, partner,
co-venturer, director, officer, employee, agent, consultant or otherwise) any
person, firm, corporation, association or other entity engaged in any business
that is competitive with the Business of the Company or of any subsidiary or
affiliate of the Company as conducted during the Term with respect to any period
during the Term, or upon the termination of Employee's employment hereunder with
respect to any period thereafter, or become interested in (as owner,
stockholder, lender, partner, co-venturer, director, officer, employee, agent,
consultant or otherwise) any portion of the business of any person, firm,
corporation, association or other entity where such portion of such business is
competitive with the business of the Company or of any subsidiary or affiliate
of the Company as conducted during the Term with respect to any period during
the Term, or upon termination of Employee's employment hereunder with respect to
any period thereafter. Notwithstanding the foregoing, Employee may hold not more
than one percent (1%) of the outstanding securities of any class of any
publicly-traded securities of a company that is engaged in activities referenced
in Section 8(a) hereof;

        (c) influence or attempt to influence any licensee, strategic partner,
supplier, or customer of the Company or potential licensee, strategic partner,
supplier or customer of the Company to terminate or modify any written or oral
agreement or course of dealing with the Company; or

        (d) influence or attempt to influence any person to either (i) terminate
or modify his employment, consulting, agency, distributorship or other
arrangement with the Company, or (ii) employ or retain, or arrange to have any
other person or entity employ or retain, any person who has been employed or
retained by the Company as an employee, consultant, agent or distributor of the
Company at any time during the twelve (12) month period immediately preceding
the termination of Employee's employment hereunder.

For purposes of this Section 8, the Restricted Period shall constitute (as
applicable) (i) the period, if any, that Employee shall receive severance as set
forth in Section 9 hereof, (ii) in the event Employee's employment hereunder is
terminated for cause pursuant to Section 9 hereof, a period of one (1) year
following


                                       -7-







such termination, or (iii) in the event that Employee terminates this Agreement
without Good Reason, so long as the Company voluntarily pays severance to
Employee (which the Company shall be under no obligation to do), for the period
that Employee shall receive such severance, but in no event for a period longer
than one (1) year.

     9. Termination. Employee's employment hereunder may be terminated during
the Term upon the occurrence of any one of the events described in this Section
9. Upon termination, Employee shall be entitled only to such compensation and
benefits as described in this Section 9.

     9.1. Termination for Disability.

        (a) In the event of a long-term disability of the Employee (as such term
is defined in the Company's Long- Term Disability Plan) such that the
Employee is not otherwise qualified to perform the essential functions of the
job with or without reasonable accommodation ("Disability"), Employee's
employment hereunder may be terminated by the Company.

        (b) In the event of a termination of Employee's employment hereunder
pursuant to Section 9.1(a), Employee will be entitled to receive all accrued and
unpaid (as of the date of such termination) Base Salary and Benefits and other
forms of compensation and bonus payable or provided in accordance with the terms
of any then existing compensation, bonus or benefit plan or arrangement ("Other
Compensation"), including payments prescribed under any disability or life
insurance plan or arrangement in which Employee is a participant or to which
Employee is a party as an employee of the Company. In addition, for a period of
one year following such termination, Employee shall be entitled to receive (i)
regular installments of Base Salary at the rate in effect at the time of such
termination, such amount being reduced by the amount of payments received by the
Employee with respect to this period pursuant to any Social Security entitlement
or any long term disability or any other employee benefit plan, policy or
program maintained to provide benefits in the event of disability in which the
Employee was entitled to participate at the time of termination under Section
9.1(a), and (ii) medical and dental coverage on terms and conditions comparable
to those most recently provided to the


                                       -8-







Employee pursuant to this Agreement, to the extent such coverage is not provided
under other Company policies, plans or programs relating to Disability. Except
as specifically set forth in this Section 9.1(b), the Company shall have no
liability or obligation to Employee for compensation or benefits hereunder by
reason of such termination.

        (c) For purposes of this Section 9.1, the determination as to whether
Employee has a long-term disability (as such term is defined in the Company's
Long-Term Disability Plan) shall be made by a licensed physician selected by the
Company (and reasonably acceptable to Employee) and shall be based upon a full
physical examination and good faith opinion by such physician.

     9.2. Termination by Death. In the event that Employee dies during the Term,
Employee's employment hereunder shall be terminated thereby and the Company
shall pay to Employee's executors, legal representatives or administrators an
amount equal to the accrued and unpaid portion of his Base Salary, Benefits and
Other Compensation up through the date on which he dies. Except as specifically
set forth in this Section 9.2, the Company shall have no liability or obligation
hereunder to Employee's executors, legal representatives, administrators, heirs
or assigns or any other person claiming under or through him by reason of
Employee's death, except that Employee's executors, legal representatives or
administrators will be entitled to receive the payment prescribed under any
death or disability benefits plan in which he is a participant as an employee of
the Company, and to exercise any rights afforded under any compensation or
benefit plan then in effect.

     9.3. Termination for Cause.

        (a) The Company may terminate Employee's employment hereunder at any
time for "cause" upon written notice to Employee. For purposes of this
Agreement, "cause" shall mean: (i) any material breach by Employee of any of his
obligations under this Agreement, which breach is not cured within thirty (30)
days after Employee's receipt of written notification from the Company of such
breach, (ii) other conduct of Employee involving any type of willful misconduct
with respect to the Company, including without limitation fraud, embezzlement,
theft


                                       -9-





or proven dishonesty in the course of his employment or conviction of a
felony.

        (b) In the event of a termination of Employee's employment hereunder
pursuant to Section 9.3(a), Employee shall be entitled to receive all accrued
but unpaid (as of the effective date of such termination) Base Salary, Benefits
and Other Compensation. All Base Salary, Benefits and Other Compensation shall
cease at the time of such termination, subject to the terms of any benefit or
compensation plan then in force and applicable to Employee. Except as
specifically set forth in this Section 9.3, the Company shall have no liability
or obligation hereunder, including without limitation for any severance
whatsoever, by reason of such termination.

     9.4. Termination Without Cause.

        (a) The Company may terminate Employee's employment hereunder at any
time, for any reason, without cause, effective upon the date designated by
the Company upon thirty (30) days prior written notice to Employee.

        (b) In the event of a termination of Employee's employment hereunder
pursuant to Section 9.4(a) (including by the Company's delivery of written
notice not to renew the Term in accordance with the provisions of Section 1
hereof in the event such termination is not for cause), Employee shall be
entitled to receive all accrued but unpaid (as of the effective date of such
termination) Base Salary, Benefits and Other Compensation. In addition, Employee
shall be entitled to receive (i) severance in an amount equal to Employee's Base
Salary and (ii) medical and dental coverage on terms and conditions comparable
to those most recently provided to the Employee pursuant to this Agreement, both
for the period of one year commencing upon the date of such termination. Such
severance shall be inclusive of all applicable income, social security and other
taxes and charges which are required by law to be withheld by the Company and
shall be withheld and paid in accordance with the Company's normal payroll
practice for its executives from time to time in effect. All Base Salary,
Benefits and Bonuses shall cease at the time of such termination, subject to the
terms of any benefit or compensation plan then in force and applicable to
Employee. Except as specifically set


                                      -10-





forth in this Section 9.4, the Company shall have no liability or obligation
hereunder by reason of such termination.

     9.5. Termination by Employee.

        (a) Employee may terminate Employee's employment hereunder at any time,
for Good Reason or without Good Reason, effective upon the date designated
by Employee in written notice of the termination of his employment hereunder
pursuant to this Section 9.5(a); provided that, such date shall be at least
thirty (30) days after the date of such notice. For purposes of this Agreement,
Good Reason shall mean: (i) the failure by the Company to pay in a timely manner
Base Salary or any other material form of compensation or material benefit to be
paid or provided to Employee hereunder, or (ii) any material breach, not
encompassed within clause (i) of this Section 9.5(a), of the obligations of the
Company under this Agreement which breach is not cured within thirty (30) days
after the Company's receipt of written notification from the Employee of such
breach.

        (b) In the event of a termination of Employee's employment hereunder
pursuant to Section 9.5(a) hereof, Employee shall be entitled to receive all
accrued but unpaid (as of the effective date of such termination) Base Salary,
Benefits and Other Compensation. In addition, solely if such termination is for
Good Reason, Employee shall be entitled to receive (i) severance in an amount
equal to the Employee's Base Salary, and (ii) medical and dental coverage on
terms and conditions comparable to those most recently provided to the Employee
pursuant to this Agreement, both for the period of one year commencing upon the
date of such termination. Such severance shall be payable as set forth in
Section 9.4(b) hereof. Except as specifically set forth in this Section 9.5(b),
all Base Salary, Benefits and Other Compensation shall cease at the time of such
termination, subject to the terms of any benefit or compensation plan then in
force and applicable to Employee. Except as specifically set forth in this
Section 9.5, the Company shall have no liability or obligation hereunder by
reason of such termination.

     9.6. Change of Control.



                                      -11-





        (a) If there is a Change of Control during the Term, and Employee's
employment with the Company hereunder is terminated within one (1) year
following such Change of Control by the Company (except for cause) or by
Employee (whether or not for Good Reason), Employee shall be entitled to receive
all accrued but unpaid (as of the effective date of such termination) Base
Salary, Benefits and Other Compensation. In addition, (i) Employee shall be
entitled to receive, on the date of such termination, an amount equal to two
years' worth of Employee's Base Salary, and (ii) all stock options granted to
Employee by Company which pursuant to the terms of the applicable stock option
plan vest upon a Change in Control (e.g., Section 17(b) of the 1995 Stock Option
Plan for Employees and Outside Directors) shall vest. Except as specifically set
forth in this Section 9.6, all Base Salary, Benefits and Other Compensation
shall cease at the time of such termination, subject to the terms of any benefit
or compensation plans then in force and applicable to Employee, and the Company
shall have no liability or obligation hereunder by reason of such termination.

        (b) For purposes of this Section 9.6, a "Change of Control" means the
acquisition (including by merger or consolidation, or by the issuance by the
Company of its securities) by one or more persons in one transaction or a series
of related transactions, of more than fifty percent (50%) of the voting power
represented by the outstanding stock of the Company on the date hereof. For
these purposes,"Person" means an individual, partnership, corporation, joint
venture, association, trust, unincorporated association, other entity or
association.

     9.7. Termination for Absenteeism

        (a) Regular attendance at work or in conducting work is an essential
element of Employee's job. Without limiting the Company's right to terminate
Employee pursuant to Section 9.1 or 9.3 herein, in the event that Employee is
absent for more than one hundred and fifty (150) days within any twelve (12)
month period, Employee's employment hereunder may be terminated by Company.

        (b) In the event of a termination of Employee's employment hereunder
pursuant to Section 9.8(a), Employee will be entitled to receive all accrued and
unpaid (as


                                      -12-







of the date of such termination) Base Salary and Benefits and other forms of
compensation and bonus payable or provided in accordance with the terms of any
then existing compensation, bonus or benefit plan or arrangement ("Other
Compensation"), including payments prescribed under any disability or life
insurance plan or arrangement in which Employee is a participant or to which
Employee is a party as an employee of the Company. In addition, for a period of
one year following such termination, Employee shall be entitled to receive (i)
regular installments of Base Salary at the rate in effect at the time of such
termination, such amount being reduced by the amount of payments received by the
Employee with respect to this period pursuant to any Social Security entitlement
or any long term disability or any other employee benefit plan, policy or
program maintained to provide benefits in the event of disability in which the
Employee was entitled to participate at the time of termination under Section
9.8(a), and (ii) medical and dental coverage on terms and conditions comparable
to those most recently provided to the Employee pursuant to this Agreement, to
the extent such coverage is not provided under other Company policies, plans or
programs relating to Disability. Except as specifically set forth in this
Section 9.8(b), the Company shall have no liability or obligation to Employee
for compensation or benefits hereunder by reason of such termination.


     10. Other Agreements. Employee represents and warrants to the Company that:

        (a) There are no restrictions, agreements or understandings whatsoever
to which Employee is a party which would prevent or make unlawful
Employee's execution of this Agreement or Employee's employment hereunder, or
which are or would be inconsistent or in conflict with this Agreement or
Employee's employment hereunder, or would prevent, limit or impair in any way
the performance by Employee of his obligations hereunder,

        (b) Employee's execution of this Agreement and Employee's employment
hereunder shall not constitute a breach of any contract, agreement or
understanding, oral or written, to which Employee is a party or by which
Employee is bound, and



                                      -13-





        (c) Employee is free to execute this Agreement and to enter into the
employ of the Company pursuant to the provisions set forth herein.

        (d) Employee shall disclose the existence and terms of the restrictive
covenants set forth in this Agreement to any employer that the Employee may work
for during the term of this Agreement (which employment is not hereby
authorized) or after the termination of the Employee's employment at the
Company.


     11. Survival of Provisions. The provisions of this Agreement set forth in
Sections 6, 7, 8, 9 (solely with respect to the payment obligations of the
Company to Employee, if any, set forth therein), 10 and 21 hereof shall survive
the termination of Employee's employment hereunder. If for any reason Employee
shall continue to be employed by the Company following the termination of
Employee's employment hereunder, Employee shall have no right to receive any
severance or other payments hereunder until Employee ceases to be employed by
the Company, whereupon Employee's right to severance or other payments, if any,
shall be governed by the provisions of Section 9 hereof with respect to the
particular circumstances involved in the Employee's termination of employment.


     12. Successors and Assigns. This Agreement shall inure to the benefit of
and be binding upon the Company and Employee and their respective successors,
executors, administrators, heirs and/or permitted assigns; provided, however,
that neither Employee nor the Company may make any assignments of this Agreement
or any interest herein, by operation of law or otherwise, without the prior
written consent of the other parties hereto.


     13. Employee Benefits. This Agreement shall not be construed to be in lieu
or to the exclusion of any other rights, benefits and privileges to which
Employee may be entitled as an employee of the Company under any retirement,
pension, profit-sharing, insurance, hospital or other plans or benefits which
may now be in effect or which may hereafter be adopted.


                                      -14-







     14. Notice. Any notice or communication required or permitted under this
Agreement shall be made in writing and sent by certified or registered mail,
return receipt requested, by hand delivery, or by recognized overnight courier,
addressed as follows:

                  If to Employee:

                           Gregory Webb
                           c/o InterDigital Communications Corporation
                           781 Third Avenue
                           King of Prussia, Pennsylvania  19406

                  If to Company:

                           InterDigital Communications Corporation
                           781 Third Avenue
                           King of Prussia, Pennsylvania  19406
                           Attn: Harry Campagna, Chairman



with a copy to:

                           Pepper, Hamilton & Scheetz
                           3000 Two Logan Square
                           18th and Arch Streets
                           Philadelphia, PA  19103
                           Barry M. Abelson, Esquire

or to such other address as either party may from time to time duly specify by
notice given to the other party in the manner specified above.

     15. Entire Agreement; Amendments. This Agreement and the Letter Agreement
contain the entire agreement and understanding of the parties hereto relating to
the subject matter hereof, and merges and supersedes all prior and
contemporaneous discussions, agreements and understandings of every nature
between the parties hereto relating to the employment of Employee with the
Company. The provisions of this Agreement supersede those set forth in Sections
(i) and (iii) of the Letter Agreement. The balance of the Letter Agreement shall


                                      -15-







remain in full force and effect and unaffected hereby. This Agreement may not be
changed or modified, except by an Agreement in writing signed by each of the
parties hereto.

     16. Waiver. The waiver of the breach of any term or provision of this
Agreement shall not operate as or be construed to be a waiver of any other or
subsequent breach of this Agreement.


     17. Governing Law. This Agreement shall be construed and enforced in
accordance with the laws of the Commonwealth of Pennsylvania.


     18. Invalidity. In case any one or more of the provisions contained in this
Agreement shall, for any reason, be held to be invalid, illegal or unenforceable
in any respect, such invalidity, illegality or unenforceability shall not affect
the validity of any other provision of this Agreement, and such provision(s)
shall be deemed modified to the extent necessary to make it enforceable.


     19. Section Headings. The section headings in this Agreement are for
convenience only; they form no part of this Agreement and shall not affect its
interpretation.


     20. Number of Days. In computing the number of days for purposes of this
Agreement, all days shall be counted, including Saturdays, Sundays and legal
holidays; provided, however, that if the final day of any time period falls on a
Saturday, Sunday or day which is a holiday in the Commonwealth of Pennsylvania,
then such final day shall be deemed to be the next day which is not a Saturday,
Sunday or legal holiday.


     21. Specific Enforcement; Extension of Period.

        (a) Employee acknowledges that the restrictions contained in Section
6, 7, and 8 hereof are reasonable and necessary to protect the legitimate
interests of the Company and


                                      -16-







its affiliates and that the Company would not have entered into this Agreement
in the absence of such restrictions. Employee also acknowledges that any breach
by him of Sections 6, 7, or 8 hereof will cause continuing and irreparable
injury to the Company for which monetary damages would not be an adequate
remedy. The Employee shall not, in any action or proceeding to enforce any of
the provisions of this Agreement, assert the claim or defense that an adequate
remedy at law exists. In the event of such breach by Employee, the Company shall
have the right to enforce the provisions of Sections 6, 7, and 8 of this
Agreement by seeking injunctive or other relief in any court, and this Agreement
shall not in any way limit remedies of law or in equity otherwise available to
the Company. If an action at law or in equity is necessary to enforce or
interpret the terms of this Agreement, the prevailing party shall be entitled to
recover, in addition to any other relief, reasonable attorneys' fees, costs and
disbursements. In the event that the provisions of Sections 6, 7, or 8 hereof
should ever be adjudicated to exceed the time, geographic, or other limitations
permitted by applicable law in any applicable jurisdiction, then such provisions
shall be deemed reformed in such jurisdiction to the maximum time, geographic,
or other limitations permitted by applicable law.

        (b) In the event that Employee shall be in breach of any of the
restrictions contained in Section 8 hereof, then the Restricted Period shall be
extended for a period of time equal to the period of time that Employee is in
breach of such restriction.


     22. Consent to Suit. Any legal proceeding arising out of or relating to
this Agreement shall be instituted in the District Court of the Eastern District
of Pennsylvania, or if such court does not have jurisdiction or will not accept
jurisdiction, in any court of general jurisdiction in the Commonwealth of
Pennsylvania, and the Employee hereby consents to the personal and exclusive
jurisdiction of such court and hereby waives any objection that the Employee may
have to the laying of venue of any such proceeding and any claim or defense of
inconvenient forum.




                                      -17-






     23. Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original, and all of which
together shall be deemed to be one and the same instrument.

                  IN WITNESS WHEREOF, the parties have caused this Agreement to
be executed the day and year first written above.


ATTEST:                               INTERDIGITAL COMMUNICATIONS
                                      CORPORATION



By: /s/ Jane Schultz                 By: /s/ William A. Doyle
   --------------------------           -----------------------------
   Title: Assistant Secretary           William A. Doyle        
                                        Title: President

[CORPORATE SEAL]

                                      /s/ Gregory Webb
                                      --------------------------------
                                      Gregory Webb




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